See Video:https://www.youtube.com/watch?v=LqMkt4XNYJQ Mumbles (Welsh: Mwmbwls) is a headland sited on the western edge of Swansea Bay. Mumbles has been noted for its unusual place name. The headland is thought by some to have been named by French sailors, after the shape of the two anthropomorphic islands which comprise the headland. Another possible source of the name is from the word Mamucium which is thought to derive from..